Indigo Static
#4b0183
A violet that is saturated. It is dark — it carries white text and needs care with black.
Hex
#4b0183
RGB
75, 1, 131
OKLCh
34.1% 0.180 301.3°
CIELAB (D50)
19.9, 46.9, -54.6
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
- As text on white it measures APCA Lc 97.1; on black, Lc 0.0. The sign is the polarity, which the WCAG ratio discards.
- Built into an eleven-step scale, 10 of the 10 adjacent pairs stay ΔE00 2 apart — see the ramp.
- protanopia and deuteranopia and tritanopia shift it by ΔE00 9.7 and 10.9 and 42.6 — no red cone.
Text on this colour
White text
12.87:1 — passes AA
Black text
1.63:1 — fails AA
White text is the better of the two at12.87:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#4b0183
protanopia
#161683 · ΔE00 9.7
deuteranopia
#282883 · ΔE00 10.9
tritanopia
#343422 · ΔE00 42.6
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isIndigo at ΔE00 0.212: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- IndigoΔE00 0.212 · #4b0082
- Pigment IndigoΔE00 0.534 · #4d0082
- Invasive IndigoΔE00 0.79 · #49017e
- Indigo GirlsΔE00 1.594 · #4d0e88
- Grim PurpleΔE00 2.702 · #441188
- Pitch VioletΔE00 2.791 · #4a148c
- MarionberryΔE00 3.677 · #380282
- SQL Injection PurpleΔE00 3.709 · #5e0092
- American VioletΔE00 3.813 · #551b8c
- Royal PurpleΔE00 3.948 · #4b006e
- Amarklor VioletΔE00 3.964 · #551199
- OccultΔE00 3.988 · #4b1e87
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.